It's funny you ran into those values. I have a BMP180 and ran into the very same. It's part of a BerryGPS IMU V3 so I can't just switch out the chip. Bummer =(

➜ BMP180_driver git:(master) ✗ ./barometer
Entering Calibration

ac1:0x0
ac2:0x3300
ac3:0xc0
ac4:0x54
ac5:0x0
ac6:0x0
b1:0x6002
b2:0x1
mb ...